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Assiut University (2017)

Effect of Pruning and Fertilization on Sewy Date Palm Productivity Under New Valley Conditions

Hassan, Mohamed Mostafa Ahmed.

Titre : Effect of Pruning and Fertilization on Sewy Date Palm Productivity Under New Valley Conditions

Auteur : Hassan, Mohamed Mostafa Ahmed.

Etablissement de soutenance : Assiut University

Grade : Master in Agricultural Sciences 2017

Résumé partiel
This study was carried out during two successive seasons of 2013 and 2014 in a private orchard, at El-Kharga Oasis, New Valley Governorate, Egypt. Sewy date palm trees of 12 years old grown in sandy loam soil. Eighty one female palms trees of healthy with no visual nutrient deficiency symptoms, nearly uniform in shape, size and productivity were chosen and devoted to achieving this experiment. The experiment involved three studied factors (A, B and C). The first factor (A) included the effect of leaf/bunch ratio. Both leaves and bunches were pruned to attain a definite leaf/bunch ratio. The treatments were as follows : A1 : 10:1 leaf/bunch ratio, A2 : 8:1 leaf/bunch ratio, A3 : 6:1 leaf/bunch ratio. The number of bunches left on each palm was 9 bunches by removing excess earliest, latest and small clusters. The retained bunches were thinned to constant number of strands. The second factor (B) involved three treatments of magnesium fertilization, as follow : B1- 500 g magnesium sulphate (MgSO4 Mg 9.9%) (B1). B2- 750 g magnesium sulphate (MgSO4 Mg 9.9%) (B2). B3- 1000 g magnesium sulphate (MgSO4 Mg 9.9%) (B3). Soil application of magnesium fertilizer (MgSO4, Mg 9.9%) was divided into equal three doses applied three times a year i.e. April, June, July in each season. The third factor included the following three treatments from nitrogen fertilization, as follow : C1- 1000 g nitrogen/palm (2.17 kg urea, 46.5%) C2- 1250 g nitrogen/palm (2.71 kg urea, 46.5%) C3- 1500 g nitrogen/palm (3.26 kg urea, 46.5%) Soil application of nitrogen fertilizer as urea (46.5% N) was divided into three equal batches applied three times a year i.e. March, May and July in each season. Calcium superphosphate (15.5% P2O5) at 1.5 kg/palm and 1.0 kg potassium sulphate (48% K2O)/palm were added. Calcium superphosphate was added once in circle surrounded each palm on the middle of December. In addition, potassium sulphate was added at two equal batches on middle of May and July. Then, twenty seven treatments were involved in this experiment.

Présentation étendue (EULC)

Page publiée le 21 décembre 2020